Photo by Melody

PlantFiles: Scallop Shell
Marrubium supinum

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Marrubium (ma-ROO-bee-um) (Info)
Species: supinum (sup-EE-num) (Info)

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3 members have or want this plant for trade.


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Grown for foliage

Other details:
Unknown - Tell us

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
By dividing the rootball

Seed Collecting:
Unknown - Tell us

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By bootandall
Thumbnail #1 of Marrubium supinum by bootandall

By Zaragoza
Thumbnail #2 of Marrubium supinum by Zaragoza


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Gardeners' Notes:

Neutral macybee On Nov 30, 2007, macybee from Deer Park, TX (Zone 9a) wrote:

A member of the mint family and characteristically has square branching stems and opposite pairs of toothed, ovate leaves with soft hairs and conspicuous veining. The whorls of small flowers are borne in the leaf axils. The botanical name is believed to have evolved from marob, a Hebrew word meaning a bitter juice, as this was one of the bitter herbs eaten by Jews to commemorate the feast of Passover.
A native of mountainous regions in central and southern Spain, this species grows to 18" in height and has kidney-shaped, toothed leaves and pink or lilac flowers in summer.
ZONES: 7-10
These fully frost-hardy plants prefer full sun in poor, well-drained soil. Although trouble free, avoid planting them in an over-rich soil and protect from drying winds. Propagate by root division in mid-spring or from seed in late spring.


This plant has been said to grow in the following regions:

Austin, Texas

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